_:vb7025461 . "21" . _:vb7025461 "(machining, intransitive, of a tool, such as a drill bit or reamer) To tend to move radially while feeding axially, whether tending toward on-center or tending toward off-center. Walking may be desirable (e.g., when a reamer walks into concentricity) or undesirable (e.g., when a twist drill walks into eccentricity.)"@en . .